Perhaps you should try some spelling variations:
nang bac » bang bac, nang ban, nano bac
dang bac » dong bac, bang bac, dan bac
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
cuc tre » duc tre, cua tre, cuu tre

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. thi ((nang bac) OR (dang bac)) ((luc van) or (duc van)) hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. thi ((nang bac) OR (dang bac)) ((luc van) OR (duc van)) hanh tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. thi ((nang bac) OR (dang bac)) ((luc van) or (duc van)) hanh tai cuc tre*".